Navigation Links
Study pits man v. machine in piecing together 425-million-year-old jigsaw
Date:11/16/2009

A new study pitting academic expertise against a computer in recreating a 425 million-year old jigsaw puzzle has discovered that there is no substitute for wisdom born out of experience.

The research tested the reliability of expert identification versus computer analysis in reconstructing fossils. The investigation, based on fossil teeth from extinct vertebrates, found that the most specialized experts provided the most reliable identifications.

University of Leicester researcher Dr Mark Purnell said: "Being a palaeontologist can be fun, but sometimes it isn't easy. Take vertebrates, the group to which we belong. When a vertebrate animal dies, whether it's a fish, a sabre-tooth cat or a dinosaur, the flesh rots away and the bones of the skeleton are usually scattered before being fossilised. In order to interpret them correctly, the palaeontologist must piece them back together, or at least work out which bits are which.

"This is difficult enough when you have modern relatives for comparison; but what if there's nothing alive today that's remotely like the extinct animal you need to analyse? It's exactly like doing a jigsaw puzzle without a picture."

This is what faces palaeontologists who study conodonts. Lead author David Jones, who carried out the study while at the University of Leicester, explains: "Earth's oceans teemed with conodonts for 300 million years; they were the most common vertebrates around, and they were the first to evolve teeth. In fact the conodont skeleton was all teeth: a basket of hacksaw-shaped blades which was extended out of the mouth to grab prey, behind which lay pairs of slicing blades and crushing teeth a set of gnashers straight out of Alien."

Ancient marine rocks are often packed with hundreds or thousands of scattered conodont teeth, with many species jumbled up together.

"To make matters worse, within any one animal, teeth from different parts of the skeleton looked almost identical! Now we have a jigsaw puzzle with no picture, where each piece could go in different places. But just so it's not too easy, conodont teeth are also microscopic, "said Dr Purnell, of the Department of Geology.

Traditionally, experts would wrestle with this puzzle based on their previous experience and comparison with more complete skeletons, but researchers investigated whether there is another way?

For the new study, published in the latest issue of the journal Palaeontology, David Jones and Mark Purnell, from the University of Leicester, teamed-up with Peter von Bitter from the Royal Ontario Museum, Canada, to bring sophisticated statistical techniques to bear on solving this skeletal jigsaw. They used material from a 425 million year old rock deposit in Ontario, Canada which, unlike almost all other deposits in the world, preserves both scattered teeth and complete skeletons of conodonts. This material allowed them to compare the success rate of experts in placing the teeth in the correct positions within the skeleton, with the success rate of computer-based methods.

So how do the experts stack up against the machines? "Pretty well" says Jones. "This is reassuring for palaeontologists! but the computer-based approach did at least as well and was also consistent; experts disagreed amongst themselves, and less experienced palaeontologists, not surprisingly, made more mistakes.

"The statistical techniques therefore allow us to test and verify the conclusions drawn by palaeontologists, greatly increasing the confidence with which we can reconstruct the skeletons of extinct vertebrates. But it's not time to retire the experts; at least not yet..." say the researchers.


'/>"/>

Contact: Mark Purnell
mark.purnell@le.ac.uk
44-116-252-3645
University of Leicester
Source:Eurekalert  

Related biology news :

1. New study links vitamin D deficiency to cardiovascular disease and death
2. Largest gene study of childhood IBD identifies 5 new genes
3. Exploration by explosion: Studying the inner realm of living cells
4. Carnegie Mellon researchers to develop probes to study cellular GPS
5. CSHL study shows that some malignant tumors can be shut down after all
6. USC study finds big air pollution impacts on local communities
7. Singapore scientists join international study of 10,000 vertebrates genomes
8. Study points to new uses, unexpected side effects of already existing drugs
9. UIC receives $1 million grant to study fat taxes, diet, obesity
10. Study sheds light on evolution of human complexity
11. LSU ichthyologist lands major grant to study fish family history
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study pits man v. machine in piecing together 425-million-year-old jigsaw
(Date:5/24/2016)... -- Ampronix facilitates superior patient care by providing unparalleled technology to leaders of the ... latest premium product recently added to the range of products distributed by Ampronix. ... ... ... Display- Ampronix News ...
(Date:5/3/2016)... 3, 2016  Neurotechnology, a provider of high-precision ... Automated Biometric Identification System (ABIS) , a complete ... MegaMatcher ABIS can process multiple complex biometric transactions ... of fingerprint, face or iris biometrics. It leverages ... and MegaMatcher Accelerator , which have been ...
(Date:4/19/2016)... April 20, 2016 The new ... a compact web-based "all-in-one" system solution for all door ... reader or the door interface with integration authorization management ... control systems. The minimal dimensions of the access control ... the building installations offer considerable freedom of design with ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... ... ... While the majority of commercial spectrophotometers and fluorometers use the z-dimension of ... higher end machines that use the more unconventional z-dimension of 20mm. Z-dimension ... of the cuvette holder. , FireflySci has developed several Agilent flow cell product ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
(Date:6/23/2016)... , June 23, 2016 A person commits a ... crime scene to track the criminal down. An ... Food and Drug Administration (FDA) uses DNA evidence to track ... Sound far-fetched? It,s not. The FDA has increasingly ... support investigations of foodborne illnesses. Put as simply as possible, ...
(Date:6/23/2016)... 2016  The Prostate Cancer Foundation (PCF) is pleased to announce ... cures for prostate cancer. Members of the Class of 2016 were selected from ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
Breaking Biology Technology: